Composition board



Apr. 3, 1923. 1,450,582

H. C. DORN COMPOSITION BOARD Filed Dec. 29, 1920 lll 1 YIIIIII/III.

30 outside work and w PatetednApn A3, 1923.

PATENT oFFlcE.

HENRY C. DOEN, OF MILWAUKEE, rVTISCONSIN.

COMPOSITION BOARD.

Application filed December 29, 1920. Serial No. 433,875.

To all 'whom t may concern:

Be it known that I, HENRY C. DORN, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Composition Board, of which the following is a description, reference beingl drawings, whic tion.

This invention relates to improvements in composition board.

Composition board now in general use is of a solid construction and is considerable thinner than ordinary lumber on account of its comparatively heavy weight and cost to manufacture.'

The thinness of the ordinary composition board is objectionable in the building line as the thin material will give and warp easily and does not provide suflicient insulating qualities for building purposes. Furthermore the ordinary composition board is not suitable for outside work which is subjected to all climatic conditions.

It is one of the objects of the presentinvention to overcome the above mentioned oby jectionable features and provide a composition board which ma be used for inside or ich may be made in thicknesses corresponding to the thickness of standard lumber.

A further object of the present invention is to provide are a part of this specificaa composltion board having inner air spaces which impart desirable insulating qualities thereto. A further object of the invention is to provide a composition board of water proof construction which may be safely used for 40 exterior work.

A further object of the invention is to provide a composition board adapted forA use in building exterior stucco or plaster work.

A further object of the invention is to provide a composition board which is of simple construction, is strong and durable and which may be easily worked like ordinary lumber.

With the above and other objects in view the invention consists of the improved composition board and its parts and combinations as set forth in the claims, and all equivalents thereof.

had to the accompanying In the accompanying drawingl in which the same reference characters yindicate the same parts in all of the views;

Figa 1 is a side view of a wall formed of' the improved,composition board, parts broken away and other partsl in section to show interior construction;

Fig. 2 is a transverse sectional view thereof on a larger scale, taken on line 2--2 of Fig. 1;

Fig. 3 isa transverse sectional detail view onl a larger scale of the insulating portion of the'board;

Fig. 4 is a vertical sectional detail view illustrating manner of constructing an iuside and outside wall; and

Fig. 5 is a perspective view of a piece of the board adapted for stucco or plaster work.

Referring to thevdrawing the numeral 8 indicates a portion of a panel formed of the improved composition board which may be of any size or shape desired. The board is formed of an outer portion 9 of cement and asbestos, an inner portion 10 of asbestos,

plaster Paris and magnesia, and an inter-v mediate air space or insulating portion 11 formed of lengths of straw 12 coated with any desirable material 12 to render the straw as fire-proof as possible. Thestraw i is sewed together in sections by lines of stitches 13 to form mat like structures which Aextend at right angles to and adjacent each other and in spaced relation in sections and .are covered on one side with the cement and asbestos, and on the other side with asbestos, plaster Paris and magnesia in fluid state. The said composition portions will pass between the spaces of the straw sections as indicated in Fig. 3, and also between the straw section spaces and form an integral structure as shown in Figs. 1 and 2.

The lines of stitches 13 preferably extend horizontally and are connected together at the edges of the mat like structure by cords 13 which hold the horizontal stitch -lines in place and also provide for more securely fastening the board or panel to its support by driving nails or staples therethrough.

For building purposes the boards or panels may be of the standard thickness of seven eighths of an inch and be formed with rabbeted edges 14 which overlap yeach other and are secured to theY timber 15 by staples 16. The inside surface of the outside boards or panels are coated with out the moisture.

Boards or panels for inside work may be asphaltum 17 to keep made of five eighths inc-h or any other thick-v ness desired.

When it is desired to form a stucco or cement finish the outer sides ot' the boards or panels are formed with horizontally extending grooves or corrugations 18 to form a firm interlocking support for the stucco or cement 19.

0n account of the use of 'straw to form the vinsulating space 11 the composition board is comparatively light in weight and may be made considerably thicker than the ordinary composition board without materially increasing its weight. The use of the straw also imparts desirable Iheat insulatlng qualities to the board.

The improved board may be sawed, nailed and handled in the same manner as ordinary lumber. While the specification and claims describes straw as forming the insulating portion it is to be understood that the word straw is to be defined in a broad sense as covering any material of tubular form which mivht be used.

`rom the foregoing description it will be seen that the composition board is of very simple construction and is wellv adapted for the purpose described.

What I claim as my invention is:

1. A composition board, consisting of an outer portion and an inner portion and an interposed insulating portion formed of tubular parts, some of said tubular parts eX- tending at right angles with relation to other tubular parts.

2. A composition board, consisting of a thickness of material formed of asbestos and a plaster holding material and a medial insulating portion formed of straw or like material.

3. A composition board, comprising a thickness of plaster material having two or more imbedded layers of straw extending at an angle with relation to each other and forming an insulating portion.

A composition board, comprising a thickness of plastic material of one kind, a thickness of plastic material of another kind, and an interposed thickness of straw formed of several layers, some of which extend at an angle with relation to others, said plastic materials extending between portions of the straw and 'oined together to form an integral boar 5. A composition board, thickness of material formed of cement and asbestos, another thickness ot' material formed of asbestos, plaster Paris and magnesia, and an interposed insulatin portion formed of straw or like material lmbedded in both thicknesses of material to form an integral board.

6. A composition board, comprising a plastic board material having a medial insulating part formed of straw stems connected together by lines of stitches.

composition board, comprising a plastic board material having an inner medial insulating portion formed of straw stems or like material connected together by lines of stitches, the ends of the straw stems terminating within and covered by the plastic board material.

8. A composition board, comprising a plastic board material having an inner medial insulating portion formed of straw stems treated to make fire-proof and connected together by lines of stitches, the ends of the straw stems terminating within and covered by the plastic board material.

composition board, comprising two thicknesses of plastic board material joined together along one side face to form an integral structure, and layers of straw stems or like material stitched together and interposed between and imbedded in the thicknesses of material to form an insulating portion, and a Waterproof coating on one side portion of one of the thicknesses of ma.- terial.

10. A composition board, comprising two thicknesses of plastic board material joined together along one side face to form an integral structure. The outer face of one of the thicknesses of material being corrugated, and a layer of stitched together straw stems interposed between and imbedded in the thicknesses of material to form an insulatin portion.

11. A composition board, comprising a plastic board material having av medial insulating portion formed of sections of sewed together straw stems, some of said straw sections extending at an angle with relation to other sections.

In testimony whereof, I affix HENRY comprising a In signature. dy DRN. 

